more efficient check for existing dep

src/rebar_app_utils.erl

@@ -27,6 +27,7 @@
 -module(rebar_app_utils).
 
 -export([find/2,
+         find/3,
          is_app_dir/0, is_app_dir/1,
          is_app_src/1,
          app_src_to_app/1,
@@ -54,9 +55,11 @@ find(Name, Vsn, Apps) ->
                               andalso rebar_app_info:original_vsn(App) =:= Vsn
                   end, Apps).
 
+-spec is_app_dir() -> {true, file:name()} | false.
 is_app_dir() ->
     is_app_dir(rebar_utils:get_cwd()).
 
+-spec is_app_dir(file:name()) -> {true, file:name()} | false.
 is_app_dir(Dir) ->
     SrcDir = filename:join([Dir, "src"]),
     AppSrc = filename:join([SrcDir, "*.app.src"]),

src/rebar_prv_install_deps.erl

@@ -176,16 +176,22 @@ handle_dep(DepsDir, AppInfo) ->
     {AppInfo1, SrcDeps, BinaryDeps}.
 
 -spec maybe_fetch(rebar_app_info:t(), rebar_state:t()) -> ok.
-maybe_fetch(AppInfo, State) ->
-    AppDir = rebar_app_info:dir(AppInfo),
-    Apps = rebar_app_discover:find_apps([get_deps_dir(State)], all),
-    case rebar_app_utils:find(rebar_app_info:name(AppInfo), Apps) of
-        {ok, _} ->
+maybe_fetch(AppInfo, _State) ->
+    AppDir = ec_cnv:to_list(rebar_app_info:dir(AppInfo)),
+    %Apps = rebar_app_discover:find_apps([get_deps_dir(State)], all),
+    %case rebar_app_utils:find(rebar_app_info:name(AppInfo), Apps) of
+    case rebar_app_utils:is_app_dir(filename:absname(AppDir)++"-*") of
+        {true, _} ->
             ok;
         _ ->
-            ?INFO("Fetching ~s~n", [rebar_app_info:name(AppInfo)]),
-            Source = rebar_app_info:source(AppInfo),
-            rebar_fetch:download_source(AppDir, Source)
+            case rebar_app_utils:is_app_dir(filename:absname(AppDir)) of
+                {true, _} ->
+                    ok;
+                _ ->
+                    ?INFO("Fetching ~s~n", [rebar_app_info:name(AppInfo)]),
+                    Source = rebar_app_info:source(AppInfo),
+                    rebar_fetch:download_source(AppDir, Source)
+            end
     end.
 
 -spec parse_deps(binary(), [dep()]) -> {ordsets:ordset(rebar_app_info:t()), [binary_dep()]}.